Add screenshot to README.

README.md

@@ -4,21 +4,21 @@
 
 [![Build Status](https://github.com/cpp-gamedev/spaced/actions/workflows/ci.yml/badge.svg)](https://github.com/cpp-gamedev/spaced/actions/workflows/ci.yml)
 
-<!--insert media here-->
+![Screenshot_20240706-190240](https://github.com/cpp-gamedev/spaced/assets/16272243/ca360512-43dc-4a18-a286-ed9d7f6f4171)
 
 ## Runtime requirements
 
 1. GPU that supports Vulkan 1.1+.
 1. Vulkan 1.1+ loader (driver).
 1. Windows:
-  1. x64 (64 bit Intel/AMD).
-  1. Windows 10+.
-  1. Latest Visual C++ runtime.
+    1. x64 (64 bit Intel/AMD).
+    1. Windows 10+.
+    1. Latest Visual C++ runtime.
 1. GNU/Linux:
-  1. x64 (64 bit Intel/AMD).
-  1. libstdc++6 or newer.
-1.MacOS (experimental):
-  1. arm64 (64 bit ARM).
-  1. Vulkan SDK must be installed globally.
+    1. x64 (64 bit Intel/AMD).
+    1. libstdc++6 or newer.
+1. MacOS (experimental):
+    1. arm64 (64 bit ARM).
+    1. Vulkan SDK must be installed globally.
 1. Android:
-  1. arm64 (64 bit ARM) or x64 (64 bit Intel/AMD).
+    1. arm64 (64 bit ARM) or x64 (64 bit Intel/AMD).